<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        
        // 1.声明的同时直接赋值 变量的初始化
        // let age = 18
        // age = 19
        // console.log(age);
        // 2.声明多个变量
        let age = 18, uname = '张三'
        console.log(age, uname);
        </script>
</body>
</html>